2001109 has 4 divisors (see below), whose sum is σ = 2183040. Its totient is φ = 1819180.

The previous prime is 2001101. The next prime is 2001127. The reversal of 2001109 is 9011002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2001109 - 2³ = 2001101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90949 + ... + 90970.

It is an arithmetic number, because the mean of its divisors is an integer number (545760).

2^2001109 is an apocalyptic number.

It is an amenable number.

2001109 is a deficient number, since it is larger than the sum of its proper divisors (181931).

2001109 is a wasteful number, since it uses less digits than its factorization.

2001109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181930.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2001109 is about 1414.6055987448. The cubic root of 2001109 is about 126.0153882272.

The spelling of 2001109 in words is "two million, one thousand, one hundred nine".